Knight D3 Module 4

<!DOCTYPE html>
<html>
    <head>
        <title>Knight D3 Module 3</title>
        <style>
            .axis path, .axis line {
              fill: none;
              stroke: #000;
              shape-rendering: crispEdges;
            }

rect {
                fill: rgb(2, 168, 2);
            }

rect:hover {
                fill: rgb(2, 111, 2);
            }

.axis text {
                font-size: 12px;
            }

text.centered {
                text-anchor: middle;
            }

h1, p, text {
                font-family: avenir, sans-serif;
            }

h1 {
                font-weight: initial;
                margin: 4px 0px;
            }

p {
                margin: 4px 0px;
            }

.y.axis line, .y.axis path{
                opacity: 0;
            }
        </style>
    </head>
    <body>
        <h1>The Most Forested Countries</h1>
        <p>From the UN Statistics Dvision and the Millennium Development Goals Indicators, collected by <a href=noceilings.org/data>NoCeilings</a> (series LACFORES)</p>
        <svg width=960 height=800>
        </svg>
        <script src="https://d3js.org/d3.v3.min.js" charset="utf-8"></script>
        <script>
            var margin = {top: 20, right: 20, bottom: 30, left: 112},
                width = 960 - margin.left - margin.right,
                height = 800 - margin.top - margin.bottom;

var x = d3.scale.linear()
                .range([0, width]);

var y = d3.scale.ordinal()
                .rangeRoundBands([0, height-margin.bottom], 0.1);

var xAxis = d3.svg.axis()
                .scale(x)
                .orient("bottom");

var yAxis = d3.svg.axis()
                .scale(y)
                .orient("left");

d3.csv("no-ceilings-data.csv", function(row){
                //accessor to convert to numbers
                var obj = {}
                Object.keys(row).forEach(function(k){
                    var v = row[k]
                    obj[k] = +v || v;
                })
                return obj
            }, function(err, data){
                if (err) return console.error(err);
                data = data.filter(function(d){return d.population > 5});
                data.sort(function(a,b){return d3.descending(a.forests, b.forests)})
                var cutoff = 42;
                if (data.length > cutoff){ data = data.slice(0, cutoff) }

x.domain([0, d3.max(data, function(d){return d.forests})])
                y.domain(data.map(function(d){return d.country}))

var svg = d3.select("svg");

svg.append("g")
                    .attr("class", "x axis")
                    .attr("transform", "translate(" + margin.left + "," + (height-margin.bottom) + ")")
                    .call(xAxis);

svg.append("g")
                    .attr("class", "y axis")
                    .attr("transform", "translate(" + margin.left + "," + 0 + ")")
                    .call(yAxis)
                    .selectAll("text").attr("dx", "6px")
                svg.append("text")
                    .attr("x", margin.left + width/2)
                    .attr("y", height+10)
                    .attr("class", "centered")
                    .text("Percent of surface area that is forested")

svg.selectAll("rect")
                   .data(data)
                   .enter()
                   .append("rect")
                   .attr("x", margin.left)
                   .attr("y", function(d){return y(d.country)})
                   .attr("height", y.rangeBand())
                   .attr("width", function(d){return x(d.forests)})
            })
        </script>
    </body>
</html>

Modified http://d3js.org/d3.v3.min.js to a secure url

https://d3js.org/d3.v3.min.js